After a long time, Kamio Kaede coughed lightly and broke his calm: "Actually, you don't have to be too pessimistic, judging from the examination of Yamamoto Nanae's bones, the murderer did not leave a mark of crime, and the knife wound on the bone also showed that the murderer was not a professional killer, and his methods were very rusty......

Maybe he was killing for the first time, or maybe Nanae Yamamoto's death wasn't in the killer's plan...... Therefore, the murderer is likely not to have great social harm, so the investigation should focus on migrant workers at present. ”

Kitamura nodded and said, "Then adjust the direction of the case, Okuji, you continue to stare at the father and daughter of Koda Wen and Koda Natsuki, Satoshi Hino, you go to check on Nanae Yamamoto's sister to see if she is suspected of committing a crime." Kamio Kaede, you and Seto Rei went to investigate the migrant workers at the surrounding construction sites back then, and you can't let go of any clues! ”

As the focus of the new investigation unfolded, the four of them rushed in different directions, and the Okuji side has been investigating Koda Wen's bank statements and mail transactions in recent years, and even hacked into the mailbox to rummage through it year by year, but nothing was found.

The result of Satoshi Hino's investigation of his sister Yoshina Yamamoto is simple, Yoshina Yamamoto runs a company, and when he inherited the estate in Heisei 16, he was already worth more than 100 million yuan, and he couldn't take risks for a house.

And when her sister disappeared, she was negotiating an order in Aichi Prefecture, so she was excluded from the list of suspects.

Kamio Kaede tried to contact Koda Fumito himself, but the phone was always busy, and asked Koda Natsuki, saying that his father co-owned a law firm in Los Angeles, and he had taken on a few cases recently, so he was busy, and asked him to change the time and fight again.

Although he was unable to contact Koda Fumi, he and Rei Seto found out about the construction site near the scene of the crime on Sakata Road.

In Heisei 16, there were two construction sites in the vicinity, as well as a gas company.

Due to the long years and the fact that the construction team is running all over the country, the company that was working on Bantian Road is still in contact.

However, the gas company had already been contacted, and the head of the company faxed a yellowed roster of employees.

Kaede Kamio had a headache as soon as he saw the roster, and the gas company had 72 workers, 12 technicians, and 7 tanker drivers in Heisei 16 years alone.

Among them, there are 23 people who meet the characteristics of male, 20~50 years old, and a height of 1.8~1.9 meters, of which 3 have been investigated, 5 are being investigated, and 15 have left their jobs and are looking for ......

These 15 unaccounted for departing employees alone are enough to toss for a while, Kamio Kaede can't imagine that if he contacts those two construction sites, it is estimated that the roster of workers is thicker, and that is the beginning of the nightmare......

Kamio Kaede and Seto Rei were so busy that they couldn't drink water all day, but when they were about to leave work, only about a dozen people were excluded, and another stack of employee information was still stacked on the table waiting to be screened.

Kamio Kaede felt a splitting headache, he turned off the computer, went to the windowsill and opened the window to breathe, and the confidence in his heart that this case could be solved on time became less and less confident.

At the bottleneck moment, he thought of the [Primary Crime Tips] prop card in the system mall, which can get a clue about solving the case after using it, and the more information you know, the more helpful the clue you get.

As for whether the real culprit can be found according to this clue, further efforts are needed.

Kamio Kaede felt that it was time to use this prop card, at present, all the information that could be found in the entire Yamamoto Nanae skeleton case was here, and there was not much time left, tomorrow was the deadline, and if you didn't report the results to the Shiratori police, this case was really going to be handed over.

So, I entered the mall and exchanged the only 30₴ virtual currency for the item card, and used it immediately.

Then, on the virtual interface that no one could see, a burst of sand-like fragments slowly condensed into words - Case-solving tips: maps!

The prop card redeemed for 30₴ only gives a two-word clue to solve the case.

Kamio Kaede is a little confused, just a hint?

What does map mean? Kitamura had sent them to collect maps before, but there was no detailed map of the Sakata-cho area in Heisei 16, and in the end it was gone, and there was no follow-up.

Could it be that the map of the year will have the key to solving the case?

Immediately, Kamio Kaede shook his head vigorously, no, it's not a map of Heisei 16.

The hint given by the system for these two words should be based on known clues, but in the currently known information, there is no map of Heisei 16 at all, so this clue refers to something else!

What could it be?

Kamio Kaede looked out the window and pondered, the road was full of traffic, it was the rush hour after work, under the overpass, on the sidewalk, the vehicles were rolling like a torrent of steel, and the tram slowly passed through the bridge in the sunset, disappeared into the horizon, and became a black dot.

These black dots cross the city, the forest, the fields, the ocean, and every picture of daily life and natural scenery is reflected in the car window, intertwined into the most beautiful map.

Black dots, dots!

Kamio Kaede suddenly came to his senses, the map mentioned by the system actually refers to the direction of solving the case, and there is a map-related method for solving the case, called the crime geographic indicator GCT.

The general theory is to determine the areas where criminals are most likely to be active by analysing a series of key locations related to crime, such as the initial location where the victim was found, the crime scene and the place where the body was dumped.

Kamio Kaede is not sure if this method will work, because Nanae Yamamoto involves relatively little geographic information, and there are not a few points on the map at all, so if it is used for GCT, it is really a bit reluctant.

But with trust in the system, Kamio Kaede decided to give it a try, and he found the oldest map collected in this case, the Sakata-cho area map of Heisei 21, although five years have passed, but it shouldn't change much.

At Nanae Yamamoto's off-duty location, Kadokawa Magazine draws a dot; Nanae Yamamoto's home, draw a dot; Ginza Station, draw a dot; The burial ground of Sakata Road, draw a point.

Then, the two construction sites and a gas company were surveyed, and three points were drawn according to the location of the year.

Sakata Road, which runs from Ginza Station to Nanae Yamamoto's house, draws a red line with a pen of another color and connects them.

The so-called 'shortcut' of Fumito Koda's ride from his home to Ginza Station draws an imaginary red line and connects them.

In the end, the map was glued to the whiteboard by him in such a posture, fixed with magnetic nails, and then used a whiteboard marker to write down the characters and relationships involved in the case word by word.

The rows of small characters were densely packed, and after it was completed, Kamio Kaede stood in front of the map and began to think about the doubts in this case.

The smoke was puffing up next to him, Seto Rei walked over with his shoulders in his arms, and saw Kamio Kaede glancing at his cigarette butts, and smiled embarrassedly: "They're all gone, there's no one in the office anyway, I'm fine with a cigarette, I've been holding it for a day......"

As he spoke, he ran to the window and asked, "What did you find?" ”

Kamio Kaede shook his head, "I'm still trying, let's do my best." ”

He took a pen and marked the time on the map, making the whole case more three-dimensional from geography to time.

On July 20, Heisei 16, Nanae Yamamoto stayed at Kadokawa Magazine for work reasons, and many people knew about it, and it was not ruled out that someone was ambushed on his way home in advance when he learned the news.

At 22:00 in the evening, when Nanae Yamamoto got off work, he called and told his family that he would get off at Ginza Station by train and asked Koda to pick him up by bicycle. Koda didn't know who he heard about the trail, so he rode his bicycle along the trail to Ginza Station, and found that it was about the same length as the main road.

At about 22:20 in the evening, according to the attendant at the time, the train that Nanae Yamamoto was riding arrived at the station early, and with the idea of meeting her husband on the main road, Nanae Yamamoto walked along Sakata Road in the direction of home.

At 22:30, Koda Fumi rode his bicycle to Ginza Station, and at this time, he did not know that his wife had already arrived at the station and got off the train, but he was still waiting at the station, full of hope to greet his wife.

At 23:00, Fumimi Koda, who was waiting for the train again, still did not see his wife, and realizing that his wife might have gotten off the bus, he immediately rode home and walked along the main road, hoping to pick up his wife in time.

At 23:30, according to his daughter Natsuki Koda, the father rode home in a hurry, but did not find the mother, thinking that he had missed something on the road, and waited at home for a while, and after coaxing his daughter to sleep, he was ready to go out again.

At 00:00 on July 21, Koda Wen rode out again to look for it.

At 00:30, I found Ginza Station along Sakata Road, and then found Kadokawa Magazine where Nanae Yamamoto worked, and searched for relatives and friends, but there was no whereabouts of Nanae Yamamoto.

At 01:30, Tomomi Koike, who was then a patrol officer of Jiaoban, patrolled to Sakata Road at night and found no abnormalities, no excavated soil pits on the road, no cries for help, and no people haunted.

At 03:00, Koda Wen came to the police station to report the case, and the person in charge of receiving and dispatching the police was also Officer Tomomi Koike, and the search team searched until noon that night, but still did not find any trace of Nanae Yamamoto, and since then, he has been declared missing.